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Grid infrastructureUnited StatesEIR-0243

Transformer fire burns for hours at Hunterstown generating station

July 2026Published 7 Sept 2026Responsible editor: Chief Editor

SignificantElectrical839 MW
Estimated damageEstimated by the register's adjusterHow? Know the real figure?
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supply cut for about •• daysShown in the record →Full estimate
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Where
Hunterstown Generating Station, Straban Township, Adams County, Pennsylvania
Operator
LS Power
What
Transformer caught fire early on 2 July 2026
Injuries
None reported
Response
Crews from five counties in Pennsylvania and Maryland

Companies named in the reporting of this entry (being named is not a finding of fault): LS Power

What happened

A transformer at the Hunterstown Generating Station, operated and owned by LS Power, in Straban Township, Adams County, Pennsylvania, caught fire early on Thursday, 2 July 2026, sending thick black smoke over the area for hours during an extreme heat warning. Fire crews and emergency personnel from five counties across Pennsylvania and Maryland responded, including foam liquid carriers, an engine tanker, ambulances and hazardous materials support. The plant was evacuated around 10:10 a.m. as a precaution, though no evacuation was ordered for nearby residents and no shelter-in-place order was issued.

By Thursday afternoon crews shifted from actively fighting the fire to allowing the mineral oil in the transformer to burn off within its firewall and containment structure. No injuries were reported. The regional grid operator said electricity reliability was not affected because sufficient backup resources were available.

Contributing factors

The official cause of the fire had not been determined and the investigation was ongoing. The incident occurred during a regional extreme heat warning with elevated electricity demand, though sources did not state that heat contributed to the transformer failure.

Lessons learned

  1. Transformer fires with mineral oil may require a shift from active suppression to controlled burn-off once initial risk is managed.
  2. Large transformer fires at generating stations can draw mutual aid from multiple counties and states with foam and hazmat units.
  3. Grid operators should hold enough backup capacity to cover loss of a single transformer during high-demand heat events.

More lessons on fire suppression and firefighting, outages, backup supply and restoration, from every incident on the register.

Not yet known

  • Cause of the fire
  • Transformer model and age
  • Duration of any downtime
  • Cost of the damage

This entry is updated when these are reported. Get an alert for the next one like it.

Source

gettysburgtimes.com

Published 2026-09-07. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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